Device for arching and fitting semi-elliptic springs



J.- l. ROBERTS. DEVICE FOR ARCHING AND FITTING SEMI-ELLIPTIC SPRINGS.

APPLICATION FILED FEB, 28. m9.

Patented Sept. 21, 1920.

3 SHEETS-SHEET I.

WITNESSES J. l. ROBERTS.

DEVICE FOR ARCHING AND FITTING SEMI-ELLIPTIC SPRINGS.

APPLICATION FILED FEB. 28. 1919. I

, PatentedSept. 21,1920. v

3 SHEETS-SHEET 2.

. INVENTOI? JasephI Rober' ATTOHNEY8 I WITNESSES 1. "l. ROBERTS. DEVICE FOR ARCHING AND FITTINGSEMl-ELLIPTIC SPRINGS.

nrromvus showing a spring clamped inposition prior I to the initial step in forming,

' "To all whom it may concern homer so STATE-s ennu (JP-F165...-

JOSEPH ISAAC ROBERTS, orrnnsoornnnrzonng I DEVICE Fort Anonrne Am) FITTING Salim-aminegrant e,

Be it known that LiJosnrH I; ROB RTS, Ia

citizen of the United States, and aresident;

off- Prescott, in the county ofYavapai and State of Arizona, have inventedcertaln new and useful Improvements in 'Devices; for

Arching and FittingSemi-Elliptic Sprmgs, I

' bar 6 branches out into a pairof legs 7 which of whichthefollowing is a specification.

My invention relates to improvements in devices for forming and shaping semi-ellipticfsprings,' and it consists in the construe tions, combinations and arrangements here'- II I I II I V .s10t 1 '0,aI 1fd th1isthe clainpQbarsarelguidedj in the ve tical adjustment of the arehing frame; I Fixed jon itop'of'thejclainpjbars" ,7 and G iS thei'lowermember l'r'of flaiiipin. Whichtheleaves12andli; areheldin .po'si f j tion on the archiil gfframe." A elamp' s'crew i holder 1&1 is hinged at 15 'tofoneend of the f member 11. clamp screw 16 occupiesthe threaded boreofa boss in the clamp SC IBW in described and clairned. II v. I I

An object ofmy invention 1s to provide a device adapted moreparticularly for 1156111 ithe blacksmiths shop'ywhereby the leavesof sem iielliptic springs can be readily made.

Other objects and advantages w ll appear in the following specification, reference being had to the accompanying drawings" I in 1 which: i i

Figure 1 is a side'elevation 'of the device Fig. 2 is aside elevation illustratinga "15m of the initial step in} forming the leaf,

Fig. 3 is a side elevationjshowing the parts under"another adjustment" and in position forfinishing the leaf, I

I I Fig. 4 is aperspectlve view of the central I archlng'frame,

Fig. 5 is a'vertical crossfj section jofflthe arching'frame,

Fig, 7 is a perspective v1ew of the presse'rs;

Although the device-is capableforj use h other associations, it is intended primarily for use-in the blacksmithsshop where calls "are frequently made to replace semi elliptic which form the leaves of the spring. There'- 1 so I I I legs 2 and a top bar 8. Although the trestle is here shown in the conventional form, 1t

springs. I The invention isof such a nature that the leaves of the spring can be. readlly arched and fitted, and requires but the ef-'v forts of two men to operate the pressers may be made in any manner to suit the particular purpose, so long as the'top bariz is provided for the support of the forming devices; Describing thesein regularorde'r,

Specification of Letters latentf the clamp screw 16.

Fig. 6. 1s a sectional view 'oflone of the" movable clamp frames, and

son of in'th'e middle oftlieftopbar 3;; Ass-116 eiconfiiied in tearing-s38 a ainst a; boss" 9 The ,9 f

Patented Sept; 21, 1920; s flpi licatiol filed Februaty 28, 1919} Serial t o is first. ail-tat ftfofithepdiistr l. i

siminriiia an'assets:a sa i holder; A e-imp tie 117 is, hingedon the the clamp screw'holde'rflfi" so asto hold'the'j Y ends of the clampjtog Formed in the lower 12 and inplace" inithe cla iInp, The n pthe r when applying V n b h lf l mp- I screw 16 is a recessjinto which the" pin 18,911 I the upper end of an a'djusting sorew'l9' isl' arranged to enter Uponclarnping the leaves per end ofthe adjusting screw' l9. is fixed theflower member 1:1 of thef clani'p' fro'ni where 1 it extends down throu'ghII a smooth f hole in the top bar '3asclearly shown" in f leaf clamp anddown II with respect, to the top; bar 8,'vbysmeans 'o'fTa i K pair '(jf bevel gears 20 alder; The gear 201s 3, while the gear'2'1 isjournaled ina beardlej24 serves" to turn the gear 21, and-conse I, quently theg'ear 20, when it 'be mes' neeessary to adjust the leaf 'clamp'upor down as juststated,

joulrn-ale'd'ina bearing 22" (m1 topfof, the bar Q I h1g2? whichiisSubstantiallycontinuation I of the bearing 8'as shown in Fig. 4; A han-' J; i

A gage cooperates the arching I for'the purpose-of,determining the*arnountf 1' of depression and elevationvof the arching'j' i fraine initially arching-@andifinally finish;

i s. p ng af a r ap ar m ii li u ly; later? This ga acom ri'ss graduated standard 25 which is fixed in respect to the v of degrees by counter-rotating the handle V the clamping frame, are held'in spaced re adjustable clamp bars 5 and 6. One of the legs 7 of the front clampbar 6.has:-aniad justable pointer 26 which moves over the graduations on the standard 25. In initially arching a leaf, such as the one 13, the arching frame is loweredacertain number 24, and the amount of lowering of the arching frame isregulatedby consulting the Similarly,' in finally finishing the spring leaf as in Fig. 3, the gage is again gage.

consultedin order to determine the numframe in" the finishing operation.

her ofdegrees of elevation of the arching,

' The damping frames.

There aretwo oftheclamping frames 27, one at each end of the topbar 3 as clearly' shown in Figs; 1,' 2. and 3 of the drawings,

Sincethe construction ofboth of the clamping frames is alike,'the-description of one willsuifice'foribothi The clamping frame has a pair of standards'28 of which one is taller than; the other. The side membersof lation'ship by a pair of'spacer bolts 29. A

, shaped frame 38 with fa pair of'alined noncircular notches 39 in the lower edge. The, 'presser is seated on the pins 36 by means of bridge 30 also spans the two sidemembers and forms, a rest for the finger 31' of a tongs 32 which is pivoted on'a bolt 33 near thetop of the shorter one of'the two standards 28.'

The bridge-30, as well as the'bolt33, provides an additional spacer for the two side inembersofithe 'clampframe 27. Rollers 34 journaled on the clamp frames, bear on the top. andbottom surfaces of the bar 3. V The clamp frame 27 is adjustable or rather movable along the top bar 3 toward the central arching frame4. The position of the clamping frames 27 with respect to the arching "The upper The pressc r 37 either of two fpositions on the clamp;

frame 27. "The presser 37 consists of a yoke these: notches. A presser roller 40 is journaled in the frame 38, and the; axleof the roller extends out atone side to receive the handle 41 means of which the roller 4O is ail-manna by means oflwhich the pjresser forming operation. A clamp roller 421is jjournaled in the ends of arms'43 which are 37 is conveyed over the spring'leaf in the I loosely h'ung" at 44onthe presser frame 38 *"as clearlyshowni'n Fig.7.

While I the opera'tor 'bears fon'the noncircular V handle 45 ofthe presserframe 38, the clamp roller 42 is tightly bound against the lower and form leaf 12. as shown in Fig. 2. When the handle 41 is now turned, the presser roller 40 rides over the spring leaf 13 and irons it down into the shape of the form leaf 12. -The other side is handledina similar manner by anotheroperator sothat the spring leaf 13"isi shaped at both ends at the same time. r

The handles of the tongs 32 are clamped together by a loop 46 inorder to hold the ends of the form leaf 1 2 in place as shown in F igs.,1 and2. Thepurpose of. the finger '31 of the upper handle of. the tongs 'is, to

keep the lower jawiof' the tongs inflthe one 7 position and prevent its displacement The operation.

at the beginning of the operation offorming'a spring leaf, the clamp frames 27 are 5 located nearer the "extremities ofthe top bar 3 as shown in igs. 1 and '2, than theyare I located on thetop bar 3 in performing the finishing operation as illustrated in Fig-f3. A form leaf'12 is clamped in place between the jaws of the tongs 32 of each of the clampfframes 27 Theform leaffhas a hole the center which fits over the pin 18 :of 1 I V V V 7 5 the adjusting screw 19a The straight bar 13 of which a spring leaf is to be made, also has a central hole which is fitted onthe pin ,18. The clampscrew'16 is now screwed down so thatthe recess in the lower endof the clamp; screw receives the upper end'ofthepin11'8. The clamp screw'when screwed down, binds tightly upon the bar 13 and holds it; securely in place. Each of the pressers 37 is now taken and set upon the ends of the bar 13, To.

do this, it may benecessary to slightly flex,

the ends of thebar 13 in order tofenable the setting of the presser thereupon.

Each operator then bears down upon the handle 45 of the respective presser, asillustrated at the left in Fig.2. This results'in a clamping action on the bar 13 and this clamping action is obtained bythe loosely hung clamping roller42. The handl e' 41 'i s'f now grasped bythe rightfhand andY-is turned. Thiscause's the roller ";40' to roll, 7 over the bar 13 and practically "iron?j'it down into the shape of the form Ileaf. l2. In order to'obtain' the propershapeofathe, a spring leaf 13, it becomes necessary to slightly lower the arching frame 4Ibyl means of the handle/'24; Y This is dens by'slighjijly' counter-rotating the handle and the amount of loweringvof the arching frame regu- 'lated by consulting the gage at the left side.

The finishing andiiitting operations of the initially formed spring metre com-I pleted bytransferring the members to jthe f1 tallerof the two standards 28aslshown in Fig. 3. is done ,by raising.then-arching frame as shown,;-and, movingthe clamp' frames 27 inwardly. The ends o' f the members 12 and v13 are held down beneath the upper non-circular pins 36'and the, presser, frames 38'are likewise supportedon-these pins.

Should it be necessary-to. again carry the; pressers 37 over theformed member 13, they are simplyled out thereupon and the same-":ironing action is'performed as be fore. r V NVhile the construction and arrangement herein described, isthat of a generally preferred form, obviously 'modi V fications and changes may be made-without I departing from the spirit of the of the device as invention or the scope ofthe claims, s 5

Ic1aim: g 1." A portable spring-leaf; forming device, comprising a trestle, a form, clamp frames movable on the trestle and having means for gripping the ends of the form, and in-I cluding means for supporting the ends of the form when the latter is elevated for the spring leaf finishing operation and when 7 the clamp frames are moved inwardly, cengaging tral supporting means for the form comprising an arching frame, adjustable means embodied in the arching frame for clamp ing the form and a leaf bar in position prior to the forming operation, and man ually operable pressers associated with the clamp frames, including a presser frame with a presser roller for engaging the leaf bar, a,' loosely hung clamp rollerv for enthe form to obtain the clamping action, an operating handle attached to each presser frame, and a handle for turning the presser roller to accomplish the forming operation. 7

2. A portable spring-leaf forming device, comprising movable on the trestle and having means for gripping the ends of the form,including means for supporting the ends of the form when the latter is elevated for the spring leaf finishingv operation and when the clamp frames are moved inwardly, cen-' tral supporting means for the form com prising an arching frame, ad ustable means embodied in the arching frame for clamping the form and a leaf bar in position prior to the forming operation, manually operatable pressers associated with the clamp a presser roller for engaginglthe leaf bar, a loosely hung clamp roller for engaging the form to obtain the clamping action, an

operating handle attached to each presser frame, a handle for'turning the presser roller to-accomplish the forming operation, and'means embodied in the arching frame for making adjustments during the forming operation, said means including a graduated standard and a pointer.

springs, an arching frame fixedin respect tothe top bar of a trestle, a clamp including a trestle, a form, clamp frames v prising frames, including a presser frame with 1 11 e iw'ete s enning sem ipti I P- aa chi g fram asfi e i trespe t to thetop bar of a trestle,

afi e and a h ng d-m er, mei n ifo closing one side of the clamp, gclamping means carried by the hinged member, clamp rs depend nt rem t fix dmp me c.

earing m ns o lit top ba or-sai mp sn adjli rew pen n r i e ed mp mbe and ha ing 7 a-pin proj ecting. above-thefixed clamp .memjher to coact with said clamping means, and; meansjournaled in a; portion of-the arching frame for: raising and lowering the adjust,

ing screw andclamp. bars together, said; means including gears, one'of the gears havingthreaded-eng gement with the adjusting screw. 4

I 11 s deem mag enemas a fixedand a hinged member, means for closing one side of the clamp, clamping means carried by the hinged member, clamp bars pendent from the fixed clamp member, bearing means on the top bar for said clamp I bars, an adjusting screw pendentlfrom the fixed clamp member and having" a pin pro jecting above the fixed clamp member to i coactwith sai'd clamping means, means journaled in a portion of theflarching frame for raising-and lowering the adjustingsorew. f;

and clamp bars together, said means includ ing gears, one of the gears having threaded engagement with the adjusting screw, andmeans for gaging the adjustment of said adjustingscrew within a narrow limit, in cluding a fixed graduated standard and an adjustable pointer on a portion" of one of the clamp bars.

5. Means for-gaging the adjustments of anarching frame withinanarrow limit at" any of the major adjustments thereof, coman adjustable arching frame mounted on the top bar of a trestle and ineluding clamp bars, means for adjusting the arching frame including a screw and re-' voluble means arranged J-to advance the screw, bearings for'the clamp bars, a graduated standard fixed on-one of the bearings,

- a pointer slidable on one of the clamp bars,

a clamp frame comprising side 'members arranged'to flank the top bar of v cular holes near thetop, rollers disposed bep tween the side members and engaging the top and bottom surfaces of'said top bar,

spacing means for the side members includ inglal bridge, tongs pivoted? on the" short section fitted in said openings, and arranged to support-a presser 1n 611311611016 two :positions.

7.--In a device for f orming semi-elliptic V springs, a pres'ser comprising a frame haw ingalining non-cireulari'notchesfor receiv' 'ing' the non-circular supporting pins ofa clamp-frame, a p'resser rollerjonrnaledin; the frame and'ha'ving a turning handle,

'presser handle attached to the frame, a clamp roller, and clamp roller supportingu arms pivotally mounted "on'saidiramei 1" 7 8; In a 'semi-elliptic spring formingde vice, acentral arch support carrying a form 7. member for holding a leaf bar, and means I for clamping theleaf bar and form member in place 'onthe arch support, comprising a lower clamp with a screw' holder movably mounte'dtat one end of the clamp, and a.

clamp tie'at the other, and ;a central clamp screw foriengaging the leaf bar-when in positionon' the form, and the clamp tie is swun against the screw holder. v

9. n aspring forming device, a presser frame with a' handle to be borne on by the operator, a relatively fixed presser roll with a handle for turning it, and a companion presser roll with a swinging mounting on the frame. 7

l0. Arching frame guidefmeans, comprisingin combinationwith a top bar ha'ving'a' slot and bearings, a pair ofclamp bars, one occupying the slot, the other branching into legs occupying the bearings. v I V JOSEPH ISAAC ROBERTS. 

